The TS-1011-A5B3-D2 is a tactile switch manufactured by Yuandi. It is a DIP (dual in-line package) switch with 12 pins and is 12mm x 12mm x 6.0mm in size. It is RoHS (Restriction of Hazardous Substances) compliant, meaning that it is free from hazardous materials and is safe for human contact. This switch is commonly used for providing tactile responses in electronics such as computers, game controllers, audio devices, and other consumer products. The TS-1011-A5B3-D2 is capable of operating at DC 5V and up to 3A of current. Some features of this switch include a long service life, waterproof rating of up to IP68, quick installation, and a high contact force of 1.2N. It is typically used in applications that require a reliable and durable switch, such as for medical devices or industrial machinery.